91ec87d57f
We used to store the wall-to-monotonic offset and the realtime base. It's faster to precompute the monotonic base. This is about a 3% speedup on Sandy Bridge for CLOCK_MONOTONIC. It's much more impressive for CLOCK_MONOTONIC_COARSE. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: John Stultz <john.stultz@linaro.org>
31 lines
622 B
C
31 lines
622 B
C
#ifndef _ASM_X86_VGTOD_H
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#define _ASM_X86_VGTOD_H
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#include <asm/vsyscall.h>
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#include <linux/clocksource.h>
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struct vsyscall_gtod_data {
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seqcount_t seq;
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struct { /* extract of a clocksource struct */
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int vclock_mode;
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cycle_t cycle_last;
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cycle_t mask;
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u32 mult;
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u32 shift;
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} clock;
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/* open coded 'struct timespec' */
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time_t wall_time_sec;
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u32 wall_time_nsec;
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u32 monotonic_time_nsec;
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time_t monotonic_time_sec;
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struct timezone sys_tz;
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struct timespec wall_time_coarse;
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struct timespec monotonic_time_coarse;
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};
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extern struct vsyscall_gtod_data vsyscall_gtod_data;
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#endif /* _ASM_X86_VGTOD_H */
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